Embroidery attachment for zigzag sewing machines



M. A. ZUCKER July 14, 1953 EMBROIDERY ATTACHMENT FOR ZIGZAG SEWINGMACHINES 4 Sheets-Sheet 2 Filed Nov. 15, 1951 INVENTOR orrz's ZZuc/cerQLM ATTORNEYS July 14, 1953 M. A. ZUCKER EMBROIDERY ATTACHMENT FORZIGZAG SEWING MACHINES 4 Sheets-$heet 3 Filed NOV. '15, 1951 VIIIIIIII ZIII s II; c -k\\\\\\ w 4732 y w 3 Z z 2 K e INVENTOR Mrrz's-fi. Zuo/rerBY v M ATTORNEYS y 1953 M. A. ZUCKER 2,645,195

EMBROIDERY ATTACHMENT FOR ZIGZAG SEWING MACHINES 4 Sheets-Sheet 4 FiledNov. 15, 1951 l' E3 INVENTOR J2 Mfrz'sf. Zuaker' BY FM ATTORNEYSPatented July 14, 1953 UNITED EMBROIDERY ATTACHMENT FOR ZIGZAG SEWINGMACHINES Morris A. Zucker, Bronx, N. Y. 7 Application November 13, 1951,Serial No. 255,953

3 Claims.

This invention relates to sewing machines.

An object of this invention is to provide an attachment for a sewingmachine of that type forming a zigzag stitch which will convert themachine into an embroidery machine.

In zigzag sewing machines, means has been provided whereby the width ofthe stitch may be varied from a minimum to a maximum, but in order tochange the width of the stitch the machine must be stopped so that themachine cannot be used in making of embroidery where the width of thestitches changes progressively. The attachment embodied in thisinvention is so constructed and arranged that the Width of the stitchcan be varied at the will of the operator while the machine is inoperation so that the stitches may be varied according to the embroiderydesign.

Another object of this invention is to provide,

an attachment of this kind which can be mounted on the presentconstruction of the sewing machine in a short time, and upon removal ofthe attachment the machine will operate as originally designed.

With the above and other objects in view, my invention consists in thearrangement, combination and details of construction disclosed in thedrawings and specification, and then more particularly pointed out inthe appended claims.

In the drawings:

Figure 1 is a detailed front elevation of a zigzag sewing machine havinan embroidery attachment mounted thereon constructed according to anembodiment of this invention.

Figure 2 is a plan view of the machine and the attachment.

Figure 3 is a fragmentary sectional view taken on the line 33 of Figurel.

I Figure 4 is a fragmentary sectional view taken on the line 44 ofFigure 1. V

Figure 5 is a sectional view taken on the line 5--5 of Figure 2.

Figure 6 is a fragmentary sectional view taken on the line 6-6 of Figure1.

Figure 7 is a sectional view taken on the line of Figure 5.

. Figure 8 is a fragmentary sectional view taken on the line 88 ofFigures 1 or 2.

Figure 9 is a fragmentary sectional view taken on the line 9-9 of Figure8.

Figure 10 is a fragmentary sectional view takenv on the line |-||l ofFigure 5.

Referring to the drawings, the numeral l designates generally a sewingmachine of conventional construction of the type designed for makingzigzag stitches. The sewing machine I5 includes a vertically disposedsupport H; with a horizontal arm I1 and a head I8 within which theneedle bar vertically reciprocates. The head |8 has a needle bar orcarrier I9 movably disposed therein and the needle bar I9 is oscillatedas it vertically reciprocates by means of a cam operated arm or lever20. The arm or lever 20 extends into cam housing 2| which is providedwith conventional cam means for effecting reciprocation of the arm oflever 20..

Thestructure hereinbefore described is of conventional construction andin order to provide a means whereby the zigzag stitch formed by themachine may be of varying width with the variation of the width of thestitch being effected while the machine is in operation, I have providedan elongated horizontally disposed guide bar 22 which is fixed byfastening means 23-a to the cam housing 2|. The guide bar 22 is formedwith y a guide channel 23 in the forward face thereof within which aslide bar 24 slidably engages. The slide bar 24 is held against lateralmovement in channel 23 by means of a pair of plates 25 secured to theguide bar 22 by fastening means 26. The forward end of the guide 22 isformed with a laterally offset extension 21, and a forwardly projectingarm 28 projects from the extension 21 and abushing or a guide 29 iscarried by the arm 28, there being a laterally projecting arm 30connected between the arm 28 and the guide bushing 29.

The forward end of the cam lever or arm 20 has a pin 3| extendingloosely therethrough and the pin 3| has a slide bar 32 fixed thereto bymeans of a nut 32-a which slidably engages in the bushing or guide 29.Link 33 is connected between the pin 3| and a bolt 34 which extendsthrough the forward end of the slide bar 24. The link 3| provides ameans whereby the slide bar 24 will be. reciprocated with reciprocatingmovement of the cam arm or lever 20. A longitudinally curved lever 35has a shaft 38 extending laterally therefrom which is journalled throughtheguide bar 22 and a bushing 31 fixed relative to the guide bar 22.

The curved lever 35 is formed with an elongated slot 38 and with asecond longitudinally curved slot 39 communicating with the slot 38. Anelongated extensible link 40 is connected between the bolt 34 and thelever 35, the rear end of link 40 being pivotally mounted on stud 4|which is fixed to and extends laterally or rearwardly' for a rocking oflever 35 with reciprocation of cam lever 20.

An elongated extensible link 42 is pivotally mounted on a stud 43 whichslidably engages through the slot 39 and stud 43 has a head 44 whichslidably engages in the slot 38. The rear end of link 42 is formed withan upwardly onset extension 45 through which the stud 43 loosely engagesThe forwardend oflink 42 is formed. with an inwardly offset extension 46formed with a twisted terminal end 41 which is pivotally secured in atwo-part pin 48 formed with a bifurcated end 49. The pin 48 includes avpair-ofstuds 50 and which are threadably connected together so that stud50 may have relative rotary movement relative to stud 5|.

Stud 5| is formed with a reduced, pin or stud '52 which is fixedlysecured in lug 53 by means of a set screw 54. The lug 53 extends fromthe needle carrier i 9 so that when link 42 is reciprocated back andforth needle carrier I9 will also be reciprocated.

In order to provide a means whereby the length of the reciprocalmovement of link 42 may be selectively varied while the machine is inoperation, I have provided a reversely bent adjusting lever 55 which ispivotally mounted on a pivot 56 carried by the guide bar 22. The rearend of lever 55 has one end of a link 51 pivotally connected therewithand the other end of link 51 is 5 pivotally connected with stud 43. Aspring 58 is connected at one end with lever 55 and at the other end toan upstanding bar 59, which projects upwardly from the guide bar 22 andprovides additional security for supporting bar 22.

Spring 58 constantly urges lever 55 upwardly so as to pull stud 43upwardly in the slot 39 to a point closely adjacent the axis of the stud36. Lever 55 is adapted to be selectively rocked downwardly by means ofa shaf-t- 60 which journalled in bearings 6!. The bearings 5| are formedas part of a C-clamp 62 having a jaw 63 engageable beneath the table 64.Clamping screws or bolts 65 are threaded through the jaw 63 and bearagainst the lower side of table 64.

A right angularly disposed rod 66 is fixedly connected at one end toshaft 60, and the other end of rod 66 is connected with the lower end ofa link 61. The link 6'! is pivotally connected as at 68 with lever 55between the ends of the latter. A depending crank member 69 extendsdownwardly from shaft 60 and a horizontally disposed rearwardlyprojecting arm extends from the lower end of crank arm or lever 69. Aplate H having a pair of bushings 12 is adjustably connected toextension 10 by means of an inverted L-shaped member 13' having avertical side 14, which is secured in the bushings 12 by grooves 15. TheL-s-haped member 13- also includes an upper horizontal side 16 which isfixedly secured in a block or coupling member 11 by means of a set screw18. The block 11 is also adjustably secured to the horizontal extension13 by means of a set screw 19. The two links 40 and 42 are adapted to beextended or shortened by similar means such as the means shown in Figure10. Each of these links is formed of apair of face-abutting bars 80 and8| having an elongated slot 82 through which a pair of bar adjustingscrews 83 are extended. The screws 83 are threaded into bar 80 as shownin Figure 10. v

In the use and operation of this device, the conventional operating armor lever 20, which in the '4 conventional zigzag machine is connected tothe needle carrier I9, is disconnected from the carrier l9 and isconnected to the pin or stud 3|. The guide bar 22 is fixed to the outerside of the cam housing 2|, and stud 48, which is carried by link 42, isconnected to the needle carrier [9.

When the machine is in operation, lever or arm 20 will reciprocate slidebar 24 and link 40 will'rock lever 35 on stud or shaft 36. The width ofthe zigzag stitch can be closely regulated or controlled by the operatorhaving a knee pressing against the presser plate 'H. Pressure to theright, as viewed in Figure 1, on plate H willcause rod 65 to rockdownwardly so as to thereby pull lever 55 downwardly. As lever 55 isrocked downwardly, link 51 will move stud 43 downwardly inslot 39 so asto thereby vary the leverage which will be exerted on the reciprocalmovement of link 42.

In the operation of the machine, the spacing between the zigzag stitchesis initially reduced to a minimum so that there will be little or nospacing between the stitches. The width of the stitches can be regulatedfrom a minimum to a maximum depending upon the position of stud 43 inthe slot 39 of rock lever 35. With this attachment, the conventionalzigzag stitching machine will be converted into an embroidery machinewherein the stitching can be applied to a fabric with the width of thestitching progressively increasing from a minimum to a maximum or from amaximum to a minimum, or the width of the stitching may be selectivelyadjusted at any point between the minimum and maximum.

What is claimed is:

1. In a zigzag stitching machine having an oscillatable needle: carrierand a cam operated operating member therefor; an embroidery attachmentconnected between said carrier and said member, said attachmentcomprising a horizontal guide bar fixed to the machine, a slide carriedby said guide bar, a linkage connected between said slide and saidmember, a rock lever pivotally carried by said guide bar a connectionbetween said slide and said rock lever, a stud slidably carried by saidrock lever and movable lengthwise of the latter, a link pivotallyconnected between said carrier and said stud, and means for moving saidstud relative to said lever to thereby vary the movement of saidcarrier.

2. In the zigzag stitching machine having an oscillatable needle carrierand a cam operated operating member therefor; an embroidery attachmentconnected between said carrier and said member, said attachmentcomprising a horizontal guide bar fixed to the machine, a slide carriedby said guide bar, a linkage connected between said slide and saidmember, a rock lever pivotally carried by said guide bar a connectionbetween said slide and said rock lever, a stud slidably carried by saidrock lever and movable lengthwise of the latter, a link pivotallyconnected between said carrier and said stud, springtensioned meansconnected with said stud for normally urging said stud to movelengthwise of said lever in one direction, and manually operable meansconnected with said stud for selectively moving said stud in theopposite direction.

In the zigzag stitching machine having an oscillatable needle carrierand a cam operated operating member therefor; an embroidery attachmentconnected between said carrier and said member, said attachmentcomprising a horizontal guide bar fixedto the-machine, a slide carriedby said guide bar, a linkage connected between said slide and saidmember, a rock lever pivotally carried by said guide bar a connectionbetween said slide and said rock lever, a stud slidably carried by saidrock lever and movable lengthwise of the latter, a link pivotallyconnected between said carrier and said stud, a second lever pivotallysecured at one end to said guide, a link pivotally connected betweensaid stud and said second lever, a spring connected to said second leverand constantly urging the latter to move said stud in the direction ofthe fulcrum of said first lever, and manually operable means connectedwith said second lever for moving said stud away from the fulcrum ofsaid first lever 15 6 7 to thereby selectively vary the oscillatorymovement of said carrier while the machine is in operation.

MORRIS A. ZUCKE'R.

References Cited in the file of. this patent UNITED STATES PATENTS

